Tiago P Monteiro

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PURPOSE To test correlations between Scheimpflug optical densitometry and ocular higher-order aberrations (HOAs) in patients with mild nuclear cataract. SETTING Cornea and Refractive Surgery Department, Hospital de Braga, Braga, Portugal. DESIGN Retrospective single-center study. METHODS In eyes with mild nuclear cataract, lens densitometry was(More)
We describe the case of a monocular 72-year-old man who presented with spontaneous acute visual decrease in the left eye 2 years after uneventful phacoemulsification with intraocular lens (IOL) and standard capsular tension ring (CTR) implantation. Dilated fundoscopy revealed aphakia and complete vitreous luxation of the entire capsular bag-IOL-CTR complex.
PURPOSE To describe the Dysfunctional Lens Index (DLI) from ray-tracing aberrometry and to test its correlations with logMAR corrected distance visual acuity (CDVA) and lens grading based on the Lens Opacities Classification System III (LOCS III) and the Scheimpflug-based lens density. METHODS The DLI was calculated by the i-Trace Visual Functional(More)
Three experiments examined behavior in extinction following periodic reinforcement. During the first phase of Experiment 1, four groups of pigeons were exposed to fixed interval (FI 16s or FI 48s) or variable interval (VI 16s or VI 48s) reinforcement schedules. Next, during the second phase, each session started with reinforcement trials and ended with an(More)
A 28 year old man with no medical history was referred to an ophthalmologist with a three year history of gradually worsening visual acuity. His left eye uncorrected distance visual acuity was 20/100, and corrected distance visual acuity was 20/60 (Snellen scale). With direct ophthalmoscopy, we could observe scissoring of the red reflex, and a penlight(More)
PURPOSE To evaluate the correlations between preoperative Scheimpflug-based lens densitometry metrics and phacodynamics. METHODS The Lens Opacities Classification System III (LOCS III) was used to grade nuclear opalescence (NO), along with different methods of lens densitometry evaluation (absolute scale from 0% to 100%): three-dimensional (3D), linear,(More)
To assess the correlations between preoperative Scheimpflug-based lens densitometry and effective phacoemulsification time (EPT) in age-related nuclear cataracts. Retrospective consecutive study. The setting was the Ophthalmology Department, Hospital de Braga, Portugal. The study population included 50 eyes (42 patients) with age-related nuclear cataracts(More)
We describe the cupid fixation technique, which allows safe repositioning of a subluxated intraocular lens (IOL). Under subconjunctival anesthesia, the body of the subluxated IOL is perforated with a 10-0 polypropylene suture on a straight needle. The IOL is then centered and fixated at the sclera overlying the ciliary sulcus; the knot is tied beneath a(More)
PURPOSE To study the relationship between objective metrics for quantifying crystalline lens dysfunction with visual impairment and phacodynamics parameters in age-related nuclear cataracts. METHODS A total of 51 eyes (34 patients) with age-related nuclear cataract had phacoemulsification. The Dysfunctional Lens Index (0 to 10 points) was measured by a(More)
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